02-08-2017 06:06 AM
Hello
After I set new System Time on Sbrio 9636, time is reseted when I reboot board. I See that there is a battery on board 3,3v probably to support track of real time ? But even though time is still reseting . So can anyone tell me what is for that battery ? And is it possible to keep track of system time ?
Thanks !
02-09-2017 10:51 AM
Hi Calmstar,
What is your method to set the time ?
Can you check if the battery is still delivering 3.3 V if you have your sbRIO since a long time ?
02-09-2017 11:54 AM
I tried two methods :
1. Via web-server manually change time and save it.
2. Programatically from PC.
I bought a new 3,3v battery , but still didn't changed anything.
What I found in datasheet is that there is a VBAT pin on RMC connector and that VBAT line is to power up real time clock to keep track of absolute time . So what is for that battery onboard ?
02-10-2017 02:45 AM
From the datasheet :
http://www.ni.com/pdf/manuals/373378c.pdf
The NI sbRIO device implements an onboard real-time clock (RTC) to keep track of absolute time. The RMC connector provides a VBAT line to power the RTC. Without a battery, absolute time will be reset during a power cycle.
At startup, the system clock of the NI sbRIO-9605/9606 resets to January 1, 1970, 12:00 a.m. (midnight), unless VBAT is implemented on the RMC.
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So the VBAT jumper activates the functionnality, and the battery brings the power.